Direct and Indirect Proportions

A farmer has enough food to feed 20 animals at his farm for 6 days.  How long the food lost if there were 10 more animals in the farm>

• 5 days
• 4 days
• 6 days
• 3 days

x and y very inversely.  When x = 15 then y = 6.  What will be the value when x = 9?

• 10
• 15
• 54
• 135

6 pipes fill a tank in 120 minutes, then 5 pipes can fill it in _______ minutes

• 100 
• 174
• 144
• 108

A packet of 500 sheets of paper has mass 2.5 kg.

Find the mass of one sheet of paper ?

• 200 kg

• 200 g

• 5 kg

• 5 g

Solve the proportion:

• c=4
• c=8
• c=14
• c=10

Lisa can fold 48 paper stars in 2 hours.

How many stars can she fold in 3 h?

• 72

• 63

• 54

• 48

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound
• $5 per pound
• $35 per pound
• 0.125 pounds per dollar

n varies directly with c. If c = 24 when n = 18, what is c when n = 22?

• 88/3

• 28

• 66/4

• 24

n varies directly with c. If c = 24 when n = 18, what is c when n = 22?

• 88/3

• 28

• 66/4

• 24

If the cost of 20 books is ₹ 180, how much will 15 books cost?

• ₹ 139

• ₹321

• ₹234

• ₹213